Some ones I've come up with for two characters that've popped into my head.
Agamemnon Choate
"Only my third eye can see."
He's been blind for over a century now and relies on his Third Eye much more than most.
Invoke: To have a better grasp of what things he sees with his Third Eye mean, to resist Third Eye blowback, to be able to tell what people are about to do when he has his Third Eye open.
Compels: To open his Third Eye when it is REALLY not a good idea, to run into problems because he's blind.
"A man does not choose his path, only how he walks it."
He has a weak ability to foresee the future (he can only foresee things that he can do nothing about) which leads him to having a very fatalistic outlook on life.
Invoke: He's fatalistic enough to shrug off most threats.
Compels: To do the right thing even if it is wildly impractible, to be fatalistic enough to act with near-suicidal unconcern for danger.
"Foster father"
He tends to adopt any stray kids he comes across, and with how old he is that really adds up.
Invoke: To get some help from a former (or current) foster child.
Compels: To have problems/complications caused by his former foster children. To adopt any stray kids he meets even if doing so is wildly impractible.
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William "Don't Call me Billy!" Breen
"I spent my childhood murdering puppies."
He was trained as a child by a Warlock to be his personal bodyguard. In order to give him practice killing things, he was forced to constantly adopt, care for and then kill (usually via magic) cute puppies.
Invoke: To know far more than he should about how to kill anything dog-like.
Compels: Various manifestations of psychological abuse, to have animals react to him negatively, to have his former master (did he escape the Wardens?) show up, acting irrationally around dogs (either nervous or overly protective), etc.
"I've got the Seven Laws burned into the insides of my eyelids."
When the Wardens came to take down his master he avoided execution (puppies don't qualify under the First Law) but one warden cast a spells so that he can see the Seven Laws written in burning words of fire on the insides of his eyelids every time he closes his eyes.
Invoke: to avoid temptation to break the Sevel Laws, to figure out creative ways of getting stuff done without breaking the Laws, to help him use magic that complies with the Seve Laws when breaking them would be a lot easier.
Compels: to be terrified of the White Council, to obey the Seven Laws even when they get in his way.
"The perfect idea, ten minutes too late."
L'esprit de l'escalier
Invoke: to think of the perfect idea... (boosts to knowledge rolls etc.)
Compels: ten minutes too late. For example, the GM could say "great idea, I'll give you a fate point if your character only realizes that ten minutes from now."
